SOLUTION (8.5)
Known: Standard R.R. Moore test specimens are made of steels having known Brinell
hardness.
Find: Estimate the rotating bending endurance limit and also the 103 cycle fatigue
strength.
SOLUTION (3.16)
Known: An AISI 4340 steel part is heat treated to 217 Bhn. A second AISI 4340 steel
part is heat treated to 363 Bhn.
Find: Estimate values of Su and Sy for both parts.
Schematic and Gi
SOLUTION (1.49)
Known: The rotational speeds and the power of input and output shafts are given.
Find: Determine the torque on each shaft.
Schematic and Given Data:
Input, 40 kW
n = 2000 rpm
Gearbox
O
SOLUTION (4.25)
Known: A straight round shaft is subjected to a known bending moment.
Find:
(a) Calculate the nominal bending stress at the surface.
(b) If a hollow shaft of inside diameter 0.5 times
SOLUTION (5.1)
Known: Three readings are obtained from an equiangular strain gage rosette mounted
on a free and unloaded surface of a part.
Find: Determine the magnitude of the principal strains and t
Assumption: The material is homogeneous.
Analysis:
1. From the above Mohr-circle,
!max = (25 + 15)/2 = 20 ksi
2. (a) For the maximum-normal-stress theory:
SF = 60/25 = 2.4
(b) For the maximum-shear-st
SOLUTION (5.30)
Known: A bracket is loaded with a torque about the Z-axis of 40 in.-lb. The geometry
and dimensions of the bracket are known.
Find: We derive expression and then calculate the deflecti